Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex. If you can contribute to the site, send me some details to Kevan, along with some description of the specific property.
Clerkenwell pub history index
Historical London public houses, Taverns, Inns, Beer Houses and Hotels.
Residents at this address.
1851/John Fisher/Beer Retailer/44/Whetstone, Middlesex/Census *
1856/John Fisher/beer retailer/../../Post Office Directory *
1861/John Fisher/Beer Retailer/56/Whetstone, Middlesex/Census *
1861/Louisa Fisher/Wife/42/Finchley, Middlesex/Census
1869/John Fisher/beer retailer/../../Post Office Directory *
* Provided By Ewan